Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d6a55359c06d65…

MALICIOUS

PDF

59.1 KB Created: 2020-08-22 17:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75367663a39227421a8ed896a40efbc1 SHA-1: 14d7e8e8b2f7613a2b613e95d76968be4f72058f SHA-256: 72d6a55359c06d656b83a8f190a067f626bf81aee55f266a7c266333d20e22bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service (ttraff.com) which is flagged as malicious. This redirector likely leads to a malicious payload or phishing page. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=queen+size+bed+sheet+in+cm+malaysia
    • http://dubono.hazletonnewsone.com/uploads/1/3/1/4/131482975/vusipazugise-mewojateb-jidatuwixejazuw.pdf
    • http://modog.ingelafurustig.com/uploads/1/3/2/6/132680813/xewuralexanoweg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/64458431792.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/6895320762.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/89954816538.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/13569790501.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/dabepipavusalitox.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/anti_slavery_policy.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/34257733610.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/hr_job_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/40385432446.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifadek.pdf
    • https://cdn.shopify.com/s/files/1/0435/8923/8943/files/kozan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/laram.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000780b.bin
c3391bab028b0047309d62b2edfcc71492e8f1aef8c71d2742936ba1665ff1c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x780B 15836 bytes
font_01_sfnt_off0000a9f2.bin
bac262505db36480b195a5a1f3d34eed3e6600520ab472d372e962a2259a1bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F2 5436 bytes
font_02_sfnt_off0000bc4b.bin
20cbfcb22557dc1b083371970a50198ba947f0c49de675d24f3b82d50224295e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC4B 10316 bytes